Running in notebook slow downs.
To add a custom camera, four methods need to be defined in a class to:
- Initialise camera
__init__, - Open camera
start_cam, - Close camera
stop_cam, and - Capture a picture as a numpy array
get_img.
By inheriting from the OpenHSI class, all the methods to load settings/calibration files, collect datacube, saving data to NetCDF, and viewing as RGB are integrated. Furthermore, the custom camera class can be passed to a SettingsBuilder class for calibration.
with SimulatedCamera(img_path="assets/rocky_beach.png", n_lines=128, processing_lvl = 3) as cam:
cam.collect()
fig = cam.show(hist_eq=True)
fig
plt.imshow(cam.rgb_buff.data)
plt.plot(cam.λs,cam.xs[0],'r',label="X(λ)")
plt.plot(cam.λs,cam.ys[0],'g',label="Y(λ)")
plt.plot(cam.λs,cam.zs[0],'b',label="Z(λ)")
plt.grid(); plt.minorticks_on()
plt.legend()
plt.xlabel("λ (nm)")
plt.ylabel("CIE XYZ value")
plt.plot(cam.binned_wavelengths,cam.dc.data[350,300,:],label="rock")
plt.plot(cam.binned_wavelengths,cam.dc.data[50,300,:], label="sky")
plt.plot(cam.binned_wavelengths,cam.dc.data[150,300,:],label="water")
plt.legend()
plt.xlabel("wavelength (nm)")
plt.ylabel("pseudo-spectra")
XIMEA Camera
Used for the OpenHSI Camera Mark I.
Make sure you install the Ximea API beforehand in the instructions https://www.ximea.com/support/wiki/apis/Python
@delegates()
class XimeaCamera(OpenHSI):
try:
from ximea import xiapi
xicam = xiapi.Camera()
except ModuleNotFoundError:
warnings.warn("ModuleNotFoundError: No module named 'ximea'.",stacklevel=2)
"""Core functionality for Ximea cameras"""
# https://www.ximea.com/support/wiki/apis/Python
def __init__(self, xbinwidth:int = 896, xbinoffset:int = 528, exposure_ms:float = 10, serial_num:str = None, **kwargs):
"""Initialise Camera"""
super().__init__(**kwargs)
self.xicam.open_device_by_SN(serial_num) if serial_num else self.xicam.open_device()
print(f'Connected to device {self.xicam.get_device_sn()}')
self.xbinwidth = xbinwidth
self.xbinoffset = xbinoffset
self.exposure = exposure_ms
self.gain = 0
self.xicam.set_width(self.xbinwidth)
self.xicam.set_offsetX(self.xbinoffset)
self.xicam.set_exposure_direct(1000*self.exposure)
self.xicam.set_gain_direct(self.gain)
self.xicam.set_imgdataformat("XI_RAW16")
self.xicam.set_output_bit_depth("XI_BPP_12")
self.xicam.enable_output_bit_packing()
self.xicam.disable_aeag()
self.xicam.set_binning_vertical(2)
self.xicam.set_binning_vertical_mode("XI_BIN_MODE_SUM")
self.rows, self.cols = self.xicam.get_height(), self.xicam.get_width()
self.img = xiapi.Image()
self.load_cam_settings()
def start_cam(self):
self.xicam.start_acquisition()
def stop_cam(self):
self.xicam.stop_acquisition()
self.xicam.close_device()
def get_img(self) -> np.ndarray:
self.xicam.get_image(self.img)
return self.img.get_image_data_numpy()
with XimeaCamera(n_lines=1024, processing_lvl = 3) as cam:
cam.collect()
fig = cam.show(robust=True)
fig